I'm using a TabBar widget and I'd like to customize the height and width of the indicator. I can't see any other property besides color I can modify.
To change tab bar background color in Flutter, first, create a getter to return the TabBar widget and then wrap the TabBar widget inside the PreferredSize -> Material widget. Inside the Material add the color property and set the color of your choice.
Just by adding isScrollable: true parameter to TabBar() all tabs shrink to one side. Without setting isScrollable: true all tabs items were taking all the space they have in the given widget. Show activity on this post. if you want to make the space around them (at right and left) where tabs closer to each other.
If you want to implement tab layout, first you need to have a tab bar which contains the list of tabs. In Flutter, you can use the TabBar widget. The TabBar can be placed anywhere according to the design. If you want to place it right under the AppBar , you can pass it as the bottom argument of the AppBar .
Give your TabBar
a property of isScrollable: true
if you don't want the tabs to expand to fill the screen horizontally the way they do by default.
You can use a Container
wrapped in a PreferredSize
to size the TabBar
. (The PreferredSize
is only necessary if you want it to live in the bottom
slot of an AppBar
.) This has the effect of making the indicators appear narrower because the TabBar
doesn't fill the screen. However, the indicator has a hard coded height. If you don't like it, you'll have to import your own copy of tabs.dart and customize the constants in that file.
Note that you can also use a Container
to set the height of the individual Tab
s, although that doesn't seem like what you're trying to do.
import 'package:flutter/material.dart';
void main() {
runApp(new MaterialApp(
home: new MyApp(),
));
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return new DefaultTabController(
length: 2,
child: new Scaffold(
appBar: new AppBar(
title: new Text('Tabs Demo'),
bottom: new PreferredSize(
preferredSize: new Size(200.0, 200.0),
child: new Container(
width: 200.0,
child: new TabBar(
tabs: [
new Container(
height: 200.0,
child: new Tab(text: 'hello'),
),
new Container(
height: 200.0,
child: new Tab(text: 'world'),
),
],
),
),
),
),
// body: ...
),
);
}
}
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